Frequency multiplier

Details Frequency multiplier Frequency multiplier

1977-11-18

1979-11-27

Gensler, Paul L.

Wave transmission lines and networks

Frequency multipliers

328 16, 363163, H01P 120, H03B 1914

Patent

active

041763327

ABSTRACT:
A signal at a frequency f.sub.0 is coupled through matching circuitry to the input of a parametric frequency multiplier stage. Non-linearities in this stage generate harmonics of the frequency f.sub.0, including a desired harmonic k.times.f.sub.0, where k=2, 4, 6, 8... . Unique output coupling circuitry presents a high load impedance to the parametric multiplier at the frequency f.sub.0, thereby enhancing harmonic generation, and transforms the impedance to signals of frequency k.times.f.sub.0 at the multiplier stage output to a desired value. The output coupling circuit includes two series connected transmission lines which couple between the output of the parametric multiplier stage and the multiplier output. A third transmission line, having an electrical length of one quarter wavelength at frequency f.sub.0, is connected as an open circuit shunt stub to the multiplier output, thereby effectively producing a short circuit thereat at f.sub.0. The combined electrical length of the series connected transmission lines is also one quarter wavelength at frequency f.sub.0 thereby transforming the short at the multiplier output to a high impedance at the output of the parametric multiplier. The desired impedance transformation is accomplished by providing each of the series connected transmission lines with an appropriate characteristics impedance.

REFERENCES:
patent: 3230396 (1966-01-01), Boelke
patent: 3263154 (1966-07-01), Steele
patent: 3662294 (1972-05-01), Jacobs et al.
patent: 3921056 (1975-11-01), Mahoney

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